balance/equilibrium = forces are equal; forces always occur in pairs friction = a force that resists motion; caused by two surfaces sliding past one another;friction always generates HEAT
gravity = force that pulls all objects towards the center of the Earh magnetism = a force caused by attraction or repelling in a magnetic field 6 simple machines: lever, inclined plane, pulley,screw, wheel and axle, wedge
Force and Motion
balance/equilibrium = forces are equal; forces always occur in pairsfriction = a force that resists motion; caused by two surfaces sliding past one another;friction
always generates HEAT
gravity = force that pulls all objects towards the center of the Earh
magnetism = a force caused by attraction or repelling in a magnetic field
6 simple machines: lever, inclined plane, pulley,screw, wheel and axle, wedge